You can find the necessary library files through several reputable community sources:
C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY
But a better approach – download a complete library that includes a MQ135.MDF (model definition file). Without this, the sensor will not change resistance with gas concentration.
: Double-click the sensor on your workspace. Under the Program File field, select the folder icon and navigate to the .HEX file included in your download. mq135 gas sensor library for proteus download upd work
Close and reopen Proteus to refresh the component library.
: Place the MQ135.HEX file in a dedicated folder on your computer where you keep simulation files. 3. Using the Sensor in Simulation
To simulate the sensor, you need the custom Proteus library files. You can find the necessary library files through
The MQ135 gas sensor is a popular component for monitoring air quality, detecting gases like ammonia, benzene, alcohol, smoke, and carbon dioxide. However, the standard Proteus Design Suite library does not include this sensor by default. To simulate an air quality project, you must manually download and install a third-party MQ135 library.
Note: ProgramData is a hidden folder. Enable "Hidden items" in Windows File Explorer to see it.
Disclaimer: All trademarks (Proteus, Arduino, MQ135) are property of their respective owners. This guide is for educational purposes only. Under the Program File field, select the folder
I can provide specific code snippets or folder directories based on your environment. Share public link
Click on the "P" button (Pick Devices) in the Component Mode. Type "MQ135" or "Gas Sensor" in the search box. Select the device, click OK, and place it on the workspace. How the MQ135 Proteus Model Works
Place a 100k potentiometer at the AO output. This allows you to manually simulate changing gas concentration during runtime.